m a s t e b



stampare-,4rNaraeeo, tarea March 17', 186s. i

IMPRVED 'FRUIT-JAR.

@the tbtinle rtftttth 'it :intimi teitets prima mit hitting tart tf tige irme.

To ALL wrIoM rr MAYooNcERN:

Beit known that I, Al D. McMnSTER, of Rochester, in the county o-i' Monroe, and State ofNew York, have"' invented a, certain new anduseful Improvement in-Sealing Fruit-Jars and other bottles and I'do hereby-declare that the following is` a full and e'xactdescription thereof, reference being had to the accompartyingA drawings, making'pa'rtof this specification.. i 4

Figure 1`1`s Va section of thejar and a'n elevation ofthe stopper. Figure 2, a perspective view ofthe'sauie parts. Figure 3, a modiiied form of the stopper. Like letters ofreference indicate. corresponding parts'inall the figures.

invention 'consists in the combina tion,` with a'shouldered'stopper and ajar-neck without zr'shoulder, of

'spiral in clines on said stopper and lugs within-said"jar-neck, so relatively situatedand arranged that, when the 'stopper is in place, `it cannot 'be withdrawn, but 4basa free and unrestrained motion downward, as hereinafter set forth, the construction also allowingthefree insertion of a knifesblade or other sharp-pointed instrumentbetween the jar-neck and stopper..

" represented in the drawings,` istil-1e neck oi' th'e'jar or bottle, and B thesto'pp'er iittingltherein. V The "n eekof the jar is' madetaperi'ng, and has oshoulder for the packing tostrike downpponj, as in. most other jars.

The stopper, which isipr'eferab'lyfmade of glass, and c ast h oilow, has a shoulder',- 6, atits lower end, againstl which rest-s the packing-ring c I desired,4 there may also be a small bead under the packing, lto preventl itf'roui` s lippirig'oii".- V I v V A plain stopper,-without aishoulder, h as beforefbeen employed in connection 'with a jar with ashoulder, as

Shown in Paten-t No. 40,415. VA shoulderedfstopperhas alsobe'en 4employed in -coiniection witlia shoulderedjar,"

as shownin PatentsNos; 415,392 and 41,532. 1 claim'neither Vofthese forms.

i The noveltyin my-caseconsists iii the eniploymentot" aV shouldered stopper, with a'taperingmouthed Vjar .with no shoulder.,` By 'this arrangeinent I atta'in the following advantages:

The shoulderon the stopper-'holdsthe'packing-ring square in'place as. it passes down the tapered neck, and' retains itinthe best position to packproperly, Where .the ring simply rests loosely aro'und'thestopper, as in i the first patent before recited, it is liable -to slip lup andbecome inclined or uneven as itis pressed down, and not pack tightly. Furthermore,Iprovide a straight passage down between the packing-ring and the neck ofV the bottle, for the i'nsertion'ofja knife-blade .orsharp-pointed instrument, for the egress of steam in sealing fruit, or'for ingress ofair in opening.` Where ashoul'derissituated in the neckfor in both theneck and stopper, the passage is so indirect lthat suchinstruruent cannot be easily inserted. This is of the utmostvimportance, for it is Athe only practicable method in which a sto'pperiandjar an be properly adapted. The employment of auf shoulder inthe neck of the jaralso limits,themotiondownward of the stopper, whilein inycaselamenabled by dispensingwith said shoulder, and employing the taper of the mouth oil the jar, to allow the 'stopper to be forced down as a screwindependently, and also to tighten, as a' wedge, closer as it goes down. To-'retain the; i

' packing in position, as the stopper is thus forced down, requires the shoulder on thestopper, as before described.

This combination of the plain-tapered neck and the shouldered stopper is therefore essential.

' In the neck of the jar or .bottle are blown two lugs or bearings, ZIZ, as learlyshown. On the periphery of the stopper are also formed spiral. inclines,ff, which, however, ,extend only part way around, and have. a space, g, between; for the insertion of the sharp-pointed knife or other instrument, asv before described, and for the passage of the stopper up'and down past the lugs. l

When thespiral inclines are inserted under the'lugs, the stopper is turned s'o as 'to press it downward, and at the extent of turning-inotion'the inelines becomeientirely clear fromthe lugs below, so that' the stopper can press ldown without restraint. 'Itis evident Athat the lugs and spiral inclin es might be reversed, or changedin position from` the one to the other `principal'part,4 with asimilar result. 4

By this nieans-I am enabled .tense a glass stopper inside the jar-neck, andai: the same time retain it in place againstV thor-upward pressure oi' the steam, and also free it from all restraiiit in its downward motion.

I am aware 'thatscreW-caps over the top or outside oi' the jar-neck h'ave'been employed, b utfthey` arefnot the equivalent -of this arrangement: In such case the heated top of thejar expands to n greater extent tlmn the cold cover, end the parts are liable to break. In my deviceI the jor can expand from the stopper without.

Tanger of breakage, but still the stopper will beheld from rising bythe inelnes anfl ings. In the old jars the screw holds the cap in a, lixefl position against both upward and downward pressure. In my' case there is no 'restraint to the downward' pressure, and therefore the stopper `czxn adjust itself toV place in the month as the jar cools. v I I I do not claim broadly the employment .of a, stopper, packing the inside of the neck of the jm', nor. o-I claim broadly screw-threads or inolines for connecting a. stopperv o1' cover with a jar; but

What I'claim as muy-invention, Yand desire to secure by Letters Pax-tent, is.-V

'lhe cylindrical stopper B, having its lower end annularly recessed and abruptly shouldered, :ind providedl with an elastic gasket, 0, in combination with an unshouldered but tapering-necked jar,provii le\l wthprojec- 'tions d d, arranged with reference to the inlined lugs ofthe stopper, substantially in tb'efnmuner and for the purposes set forth. l l

In witness whereof', I have hereunto'signed my nzme inA the presence of two subscribing VWitnesses.

' i A. D. MCMASTER.

Witnesses: A

L. M. NEWTON, R. F. OsGoo'o. 

